﻿//==============================================================================
// File: RelayCommand.cs
// Created: 2010-11-25
// Author: Piotr Włodek
//==============================================================================
// This file is a part of MAMMOTH project.
// Copyright (C) 2010 AGH University of Science and Technology, Krakow.
// https://caribou.iisg.agh.edu.pl/trac/mammoth
//
// Mammoth is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// Mammoth is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public License
// along with Mammoth. If not, see http://www.gnu.org/licenses/.
//==============================================================================

using System;
using System.Windows.Input;

namespace WpfRcp.Core.Commands
{
    public abstract class RelayCommand<T> : ICommand
    {
        #region Implementation of ICommand

        public void Execute(object parameter)
        {
            Execute((T)parameter);
        }

        public bool CanExecute(object parameter)
        {
            return CanExecute((T) parameter);
        }

        public event EventHandler CanExecuteChanged;

        #endregion

        protected virtual void OnCanExecuteChanged()
        {
            if (CanExecuteChanged != null)
            {
                CanExecuteChanged(this, EventArgs.Empty);
            }
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1030:UseEventsWhereAppropriate")]
        public void RaiseCanExecuteChanged()
        {
            OnCanExecuteChanged();
        }

        protected abstract void Execute(T parameter);

        protected abstract bool CanExecute(T parameter);
    }
}